Air source flexible water chiller-heater unit and operation method

Abstract

The invention discloses an air source flexible water chiller-heater unit and an operation method and belongs to the field of heating and air conditioning. Existing water-cooled air source water chiller-heater units can effectively achieve the cooling function in summer but cannot achieve the heating function in winter. Existing direct air-cooled air source water chiller-heater units are high in condensing temperature in summer, and the heating effect is not as good as a water-cooled system, besides, the phenomenon that outdoor heat exchangers frost in winter exists, and existing defrosting methods influence the stable heat supply to users. According to the air source flexible water chiller-heater unit, at least one outdoor evaporation-cooled heat exchanging unit and at least two outdoor air-cooled heat exchanging units are connected in parallel and connected to the water chiller-heater unit. In summer, the water chiller-heater unit exhausts heat to outdoor air through the evaporation-cooled heat exchanging unit to reduce the condensing temperature, and the energy efficiency of the water chiller-heater unit is improved. In winter, the water chiller-heater unit absorbs heat from the outdoor air through the outdoor air-cooled heat exchanging units, and hot water produced through the water chiller-heater unit is led to the specified outdoor air-cooled heat exchanging units during defrosting, and heat is supplied to the users continuously and stably under the defrosting work condition.

Description

technical field [0001] The invention relates to an air source flexible cold and hot water unit and an operation method thereof, belonging to the field of heating and air conditioning. Background technique [0002] The air source cold and hot water unit is a kind of high-efficiency cooling and heating equipment. It takes heat from the outdoor air and supplies heat to the room in winter, and releases heat to the outside air and supplies cooling to the room in summer, so as to meet the building's air conditioning and hot water requirements. need. According to the different cooling methods on the outdoor side, the air source cold and hot water units are mainly divided into direct air-cooled and water-cooled. [0003] The direct air-cooled hot and cold water system has the advantages of convenient installation, wide application range, and small footprint. Such systems use air-cooled heat exchangers to dissipate heat to the ambient air in summer, and the outdoor air acquires sen...

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Problems solved by technology

[0006] In winter heating conditions, ordinary cooling towers cannot extract heat from the ambient air, and there is no suitable low-grade heat source to ensure the normal operation of the multi-connected air-conditioning heat pump system

The Chinese patent (authorized notification number CN203934451U) proposes a method of using solution to spray air to build an energy tower as a heat pump multi-line heat extraction system. Although the cooling water antifreeze problem is solved, there are still insufficient heat extraction, high solution cost, and regeneration energy consumption. advanced questions

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